full duplex string transceiving from arduino to arduin over 2 virtuals wires

this schematic shows 2 arduinos connected together :
the TX pin 12 on arduino ARD1 connected to RX pin 11 on arduino ARD3
the RX pin 11 on arduino ARD1 connected to TX pin 12 on arduino ARD3

also it allows to treat the strings received on each arduino to use on applications later

the two lcds is used for showing data coming from the other arduino


files :
proteus disign : arduino_tx_rx_strings.DSN
ARD1 soft : command_station_3.ino
ARD3 soft : rover_arduino_3.ino